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Synthesis and characterization of novel optically active polyesters with high thermal stability
Author(s) -
Ehsani Sara,
MehdipourAtaei Shahram,
Mahmoodi Ali
Publication year - 2010
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.33392
Subject(s) - polyester , terephthaloyl chloride , terephthalic acid , thermal stability , condensation polymer , monomer , polymer chemistry , anthraquinone , solubility , materials science , chloride , chemistry , potassium hydroxide , organic chemistry , polymer
A new optically active diacid (DA) was prepared by nucleophilic substitution reaction of R‐(−)‐mandelic acid with terephthaloyl chloride in the presence of potassium hydroxide. This DA named terephthalic acid bis(carboxyphenylmethyl) ester was used as a monomer for the preparation of related optically active polyesters. Polycondensation of DA with different aromatic diols, including hydroquinone, 1,5‐dihydroxy naphthalene, 1,4‐dihydroxy anthraquinone, 1,8‐dihydroxy anthraquinone, 2,4‐dihydroxy benzophenone, and bisphenol A, in the presence of 4‐toluenesulfonyl chloride using high temperature solution method led to preparation of different polyesters. The prepared monomer and all the polymers were characterized by conventional methods. Thermal and physical properties of the polyesters, including thermal stability, thermal behavior, solution viscosity, and solubility behavior, in addition to optical activity were studied. The optically active polyesters showed high thermal stability, whereas the presence of bulky groups improved their solubility. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011